Machine for craping paper



W. W. COLLEY. MACHINE FOR CRAPING PAPER.

APPLICATInN HLED MAY I4, 1920.

Patented Apr. 4, 1922.

2 SHEETS-SHEET`I Im/@nier I J/amqy.

. W. COLLEY.

Patented Apr. 4, 1929.

2 SHEETS-SHEET 2.

Inventor.

WALTER WILLIAM COLIJEY, OF LON'DON, ENGLAND.

MACHINE ron CRAPING PAPER.

i To all whom t may concern.'

Be it known that I, WALTER VILLIAM CoL- LEY, managing director o'f Colleys Limited, roll-paper manufacturers, of 3 to 12 Marine Street, Bermondsey, London, S. E., 16, England, a subject of the Kingfof Great Britain, haveinvented certain new and useful Improvements in Machines for Craping Paper, of which the following is a specification.

This invention relates to improvements in apparatus for craping'paper in the form of a continuous web, and has for its prmary object to provide a craping machine adapted to eHect the crapingoperation upon two 0r more layers of paper simultaneously. or upon paper of greater thickness than has heretofore been dealt with, and to permitI of the craped paper being delivered from the machine in the form either of separated layers or of a single layer which, if more than one layer of paper has been fed to the machine, will be composed of two or more thicknesses permanently united to one another as the result of the craping operation. A further object of the improvements is to enable the paper, before leaving the machine, to be if desired impressed with transverse lines of weakness, or longitudinally divided, or both.

According tothe present invention-there'v is employed in combination with a pair of craping rollers having respectively a smooth and rigid and a relatively soft and resilient peripheral surface, an obstructor constituted by a straight-edged .fiat blade so Vmounted as to present its edge between the surfaces. of the craping rollers at or near their line of` bite. The paper is drawn forward by contact with the surface of the rigid roller and carriedl thence at such a Wrate through between the edge of the obstructorblade and the contiguous surface of the soft and resilient roller, that the' aper, owing to its advance being momentan y checked at short intervals, is alternately crowded-up against and allowed to pass the opposed ledge Specification of Letters Patent.- Patented Apr, 4, 1922 Application led May 14, 1920. Serial No. 381,284.

so called) but as a means of squeezing out excessive moisture from the paper and Hattening it against the surface of the rigid roller, from which the paper has been subsequently removed in a crinkled condition.

by the action of a doctor constituted by a l The several layers of paper are drawn continuously from one or more suitably-braked supply-reels mounted at the feed end of the machine, and are led over guide-rollers so as to enter together, in mutual superposition, between the craping rollers, whence the layers are led together over a positivelydriven take-off roller with which each delivery-reel for the reception of a separate layer of paper contacts in such manner as to be continuously driven by frictional contact therewith, the journals of each delivery-reel being guided radially of the take-off roller so as to be free to recede from the axis of the latter as the thicknessof paper wound upon the delivery-reel increases.

If it is required to produce transverse lines of weakness in the paper at predetermined intervals in its length, the layers of paper, before being separated from one another, are led together between a pair of positively-driven rollers whereof one (preferably the upper roller) carries a radiallyprojecting knife (or knives) or' row of pins extending parallel to the axis of the roller, whilst the other has a countersunk strip of soft metal or other suitable material, or a row of holes, adapted to coact with the edge of the knife or the points of the pins, so that the layers of paper, as they pass together between these rollers, will be transversely slitted or perforated at predetermined intervals in their length.v v

If the paper is required to be longitudinally divided into separate strips, the layers of paper, before being separated .from one another, but after receiving transverse lines of weakness if such be impressed upon the layers, are led together between a pairother roller (preferably of considerably large diameter) presents a similar series of grooves adapted to coact with the knives in' Siiaingiengthwise through an the layers of paper at once and continuously. This last mentioned grooved roller may'serve as' convenient construction of machine for craping, transversely weakening, and longitudinally dividing two layers of paper at one operation continuously, 11 and 12 are the supply reels mounted one above the other in bearings 13 and 14 at the feed end of the machine; the reels, which are free to revolve as the respective webs 15 and 16 of` paper Yare drawn from them, being adapted to be braked by means of levers 17 and 18 pivoted to the frame Vof the machine and provided with adjustable weights 19 and 20 for regulating the pressure exerted by the levers upon the reels. f

The web of paper 15 drawn Jfrom the upper reel 11 is led direct to a guide-roller 21 to which the web 16 drawn from the lower reel 12 is also led after passing beneath another guide-roller 22, and the now superposed webs are led together over a further guide-roller 23, after leaving which the superposed webs pass between the upper and lower craping rollers 24 and 25.

slnooth andcrigid surface, whilst the upper roller 24 has a soft and resihent surface due to the core of the roller being peripherally` covered, as indicated, with rubber, felt, or other suitable material. The lower craping roller 25 revolves in statitonary bearings, whereas the bearings of the upper craping roller 24 are movable in vertical guides are pressed upon by springs (not shown) the stress of which is capable of being regulated at will' by means of adjustable screws as indicated at 26. I i

The obstructor 27 is a straight edged fiat blade of metal of a thickness corresponding with the character of the craping required, adjustably fixed so as to extend substantially in the plane of the tangent to the surfaces of both craping rollers 24 and 25 at their line of bite; the edge of the blade heilig square or bluntrand presented in such position as to be encountered by the paper as it passes between the craping rollers.Y The obstructor blade 27 may be supported on brackets on the side frames of the machine as Of thesel craping rollers, the lower one has a.-

indicated at 28, so as to be adjustable in the direction of the tangent to both rollers 24' and 25 at their line 'of bite; set-screws being passed through holes in the brackets so as to bear against the blade near its rear edge.

After submission to the craping operation, the superposed layers of paper are led together between a pair of positively-driven perforating-rollers 29 and 30 whereof the upper roller 29 carries a straight row of radially-projecting pins 31 arranged in several series (five are shown in the example) corresponding in position and extent, length wise of the roller, to the widths of the respective strips into which the conjoint web of paper is to be subsequently divided as hereinafter explained; Vwhilst the lower roller 30 is formed with a corresponding row of holes adapted to coactI with the pins 31 in effect-ing the piercing of the paper.

On leaving. the perforating-rollers 29, 30, the conjoint web of paper is led between a pair of positively-driven slitting rollers 32, 33, whereof the upper roller 32 is of relatively greater diameter and has its surface peripherally grooved as at 34 at inter vals. lengthwisl of the roller, corresponding to the widths of the respective strips into which the web of paper is to be divided; whilst the lower roller 33, which is of relatively smaller diameter, carries aseries ot circumerentially-projecting annular knives 35 spaced apart at intervals corresponding to the positions of the grooves 34; the revolving knives 35 and grooves 34 beingl adapted to coact with one another in con tinuously slitting the web of paper-in the 'direction of its length so as to divide it into the required number of separate strips.

The paper passes in contact with the lower side ofthe grooved slitting-roller 32, which serves as a take-off roller, and is then lcd upwards over the surface of this roller; the two layers l5 and 16, which are separated from one another after undergoino` the, slitting operation, being respectivelv wound upon delivery-reels 36 and 37. Each of these reels is driven, not positively, but by frictional contact between the outermost convolution of paper wound upon it and the bare surface of the roller 32; the bearings of the respective reels 36 and 37 being free to recede, along guides 38 and 39, from the axis of the roller 32 as the thickness of paper wound upon each reel gradually increases.

In cases where transverse weakening and longitudinal division of the conjoint web of paper are not required, the pin-carrying roller 29 and the knife-carrying roller 33 are withdrawn from the machine.

In the example described above, it is assumed that the superposed layers 15 and 16 forming the conjoint web of paper, after being subjected to the craping, transverse tions, are required to be separated from one another before final delivery. But, inasmuch as the craping operation has for effect to unite the layers of paper so closely that they are not liable to become accidentally separated from one another, it `is evident that such a machine may be employed for producing what may be termed a composite or duplex (or it may be a multiplex) craped paper comprising two (or more) layers thus united, only a single delivery-reel 36 or 3T in such case being required.

ln any case, the employment of separate supply-reels (such as those shown at 1l and l2) for the respective layers of paper is not essential, as it may sometimes be found convenient to wind the several layers initiall \Y in mutual superposition upon. say, a single reel whence the conjoint web of paper is drawn as if it comprised only a single layer.

The method of driving the several rollers of the machine shown in Figures l and 2 is illustrated diagrammatically in Figure 3, wherein 38 is a rotary shaft carrylng fastand-loose belt pulleys 39, 40 (Figure 2) for enabling the shaft to be driven or stopped at will in the Well-known manner. Fast upon the shaft 38 is a spur-whee1 l which gears with a spur-Wheel fast on the arbor 252L of the lower craping-roller 25, this wheel 25b in turn gearing with a spur Wheel 24 of equal diameter fast on the ar bor 24fof the upper craping roller 24. The wheel 41 also gears, through an idle wheel 42, with a spur-wheel b fast on the arbor 30 of the lower perforating-roller 30, this wheel 30b in turn gearing with a spur-wheel 29h of equal diameter fast on the arbor 29 of the upper perforating roller 29. The wheel 4l further gears, through an idle wheel 43, with a spur-wheel 32b fast on the arbor 32a of the grooved slitting-roller 32, a duplicate of this wheel 32b (but placed at the opposite end of the arbor 32a) in turn gearing with a spur-Wheel 33b of relatively smaller diameter fast on the arbor 33a of the knife roller 33. By the arrangement just described, all the rollers are positively driven in the proper directions, the diam@ ters of the respective spur-wheels being proportioned in accordance with the peripheral velocities required in the several rollers themselves.

I claim l. In a paper-craping machine, the combination with a pair of craping rollers having respectively a smooth and rigid and a relatively soft and resilient peripheral surface, of an obstructor constituted by a straightedged flat blade so mounted in the machine as to present its edge between the surfaces of the craping rollers at or near their line of bite, substantially as and for the purpose set forth.

2. In a paper-craping machine as claimed in claim 1, a. pair of coacting rollers between which the paper, after subjection to the craping operation, is led; said rollers being provided with means for producing transverse lines of weakness in the paper at predetermined intervals in its length, substantially as set forth.

3. In a paper-craping machine as claimed in either of the preceding claims, a pair of coacting rollers between which the paper, after subjection to the craping operation, is led; said rollers being provided with means for continuously slitting the paper lengthwise, substantially as set forth.

et. A paper craping machine as claimed in claim 3` wherein one of the slitting rollers, positively driven, serves as a take-off roller whence the paper-delivery reel or reels is or are driven by frictional contact, substantially as set forth.

WALTER WILLIAM COLLEY. 

